Furnace attachment.



PATENTED JAN. 31,1905.

WOLF.

FURNACE ATTACHMENT. APPLICATION FILED JUNE 27, 1904.

' /NVENTOH QMJZ Z/ 77 022 A TTOHNE r5 UNiTE STATES Patented January 31, 1905.

PATENT OFFICE.

GUSTAV WOLF, OF NEW YORK, N. Y.

FURNACE'ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 781,483, dated January 31, 1905.

' 1 Application filed June 27,1904. Serial No. 211,291.

To all whom it may concern.-

Be it known that I, GUs'rAv WOLF, a citizen.

,description. 7

This invention relates to improvements in attachments for heating-furnaces for supplying atmospheric air to the interior or combustion chamber of the furnace, an object being to provide a simple device for supplying air in a highly-heatedcondition directly over the products of combustion, whereby there is a complete mingling of the air with thegases, the combustible gases being burned.

Another object is to provide a means whereby the amount of air admitted maybe regulated. i

Other objects of the invention'will appear in the general description.

I will describe a furnace attachment embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, inv which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is an elevation, partly in section, of a heater and showing a device embodying my inventionasapplied thereto; Fig. 2 is a side View of the attachment. 1 Fig. 3 is a section on the line w w of Fig. 2. Fig. A is a section on the line y g of Fig. 2. Fig. 5 is a section showing a modification, and Fig. 6 shows another modification.

Referring to the drawings, 1 designates a furnace, within which is a combustion-chamher 2, substantially'of the usual construction.

' Connected to the collar 3 of the combustionsides the casing has tubular projections 7 in each one of which is a diaphragm 8, having openings 9, which may be substantially triangular, as indicated by dotted lines in Fig. 2. Mounted to rotate on the outer side of each diaphragm is a valve-plate 10, having small openings 11, designed to be movedinto and out of register with the openings 9. At certain times these openings 11 are designed to be entirely or partly closed, thus shutting off the supply of air or regulating its inlet. As a means therefor I provide closures 12, which are mounted to swing on the valve-plates. An operating-rod 13 passes through the valveplates and also is mounted to turn in openings in the diaphragms, the said rod having angular portions for engaging in correspondingly-shaped openings in the valve-plates.

--One end of the actuating-rod is provided with a: handle 14, and arranged between a nut 15 on the other end of the rod and the valveplate atthat end is a spring 16, which serves to hold the two valve-plates yieldingly against the diaphragms. The rod 13 passes through the smoke-pipe, and mounted thereon within the smoke-pipe is a damper 17, this damper being provided in its periphery with a notch 18, through which a slight draft may be maindesigned to move, and by this ineansthe degree of opening the damper when the proper opening is discovered for the heat desired may be adjusted to the same point every day or after building fires in the heater.

The smoke-pipe is provided with an opening 21 which furnishes communication between a rear chamber 22, formed by the casing, and a rearconddctor23, arranged within the smoke-pipe, the end of said cond uctor terminating close to the collar 3, so that the heated air will be discharged directly onto the products of combustion, thus causing the combustion of the combustible gases. I deem 'it a very essential feature of my invention to so locate theoutlet of the air-conductor that the air will be discharged directly onto the gases, as above mentioned, because when the outlet is located farther away the gases pass into the smoke-pipe and are not wholly con sumed. In Fig. 5 I have shown the conductor in the form of a pipe 24, which extends into the combustion-chamber and is turned downward, terminating in a perforated nozzle 25. This will cause the heated air to pass directly downward onto the fuel and gases.

In some instances the rod 13 may be extended, as indicated in Fig. 6, and have connected to it oppositely-extended arms 26, with which rods from an automatic regulator may extend, and thus the changes of temperature in the furnace will cause the shifting of the damper, whereby an even temperature is practically maintained.

In the operation when first starting the fire the damper 17 is to be turned to open position, and the air-inlets 11 are closed. After the fire gets well under way and the casing is considerably heated the openings 11 are to be opened to any desired degree by moving the closures 12. The air passing into the casing will become highly heated and pass through the conductor 23 or 24 onto the gases, as above mentioned. By the turning of the valveplates obviously the damper will be opened.

In some instances such as in steam or hotwater heatersI employ an auxiliary device for feeding heated air into the heater for consuming the gases as soon as generated out of the coal. This device consists of a casing 27, arranged in a furnace-door 28 and having a vertical partition 29, which extends nearlyto the bottom of the casing. The inner wall above the lower end of the partition is provided with perforations 30, and air is fed into the casing through a tube 31.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. An attachment fora heater comprising a smoke-pipe section, a casing surrounding said section and forming the outer Wall of an airchamber extending around the pipe-section, an air-conductor arranged in the pipe-section and communicating with said chamber, the outlet end of said conductor being close to the end of the pipe-section, means for controlling the admission of air to the chamber, and a damper arranged in the pi pe-section, the said damper being provided with a notch.

2. A furnace attachment comprising a smoke-pipe section, a casing surrounding the same and forming the outer wall of an airchamber around the pi1' e-section, an air-conductor arranged in the pipe-section and (Ollimunicating with said air-chamber, opposite tubular extensions on the said casing, diaphragms in said extensions provided with openings, valve-plates mounted to rotate on the outer sides of said diaphragms and having openings. a rod extended through the valve-plates and through the pipe-section, and a damper arranged on said rod within the pipesection, the said damper having a notch in its periphery.

3. An attachment for a furnace comprising .a smoke-pipe section, a casing surrounding the section and forming the outer wall of an annular air-chamber, an air-eoinluctor arranged in the pipe-section and communicating with said chamber, outward tubular extensions on opposite sides of said casing, diaphragms in said extensions and provided with openings, valve-plates mounted to rotate on the outer sides of said diaphragnis and having openings, swinging closures forsaid openings, a rod extended through said plates and diaphragms, a handle on one end of said rod, a nut on the other end of the rod, a spring arranged between said nut and the valve-plate at said end, and a damper mounted on the rod within the pipe-section, the said damper being provided with a peri1')heral opening.

4:. A furnace attachment comprising a smoke-pipe section, a casing surrminding the same and consisting of separable sections, the said casing forming the outer wall of an annular air-chamber, an air-conductor arranged in the pipe-section and comnninicating with the air-chamber, the outlet end of said aireonductor being arranged to discharge air among the gases within the coinlnlstion-chamber of the furnace, means for regulating the admission of air to the air-chamber, and a notched damper arranged in the pipe-section.

In testimony whereof lhave signed my name to this specification in the presence of two subscribing witnesses.

GUS'IAV WOLF.

\Vitnesses:

JNo. M. ltrurni-z, O. R. FEhGUSON. 

